reverse polarity on appliance socket

[chris day]

Carried out an eicr and noticed x2 double sockets have reverse polarity that supply a frying machine at high level.
After correcting the reverse polarity on the two sockets i plugged the fryer back in and the circuit MCB tripped out and the appliance popped.

I am unable to open the fryer up as its fixed into the unit.

I cant seem to work out why the original appliances required the sockets to have incorrect polarity at the socket, and after correcting the reverse polarity the appliance tripped the fuse.

I checked the newly configured polarity and the sockets were correctly wired wheres before the L-N had been reversed.

 

[Pete999]

Carried out an eicr and noticed x2 double sockets have reverse polarity that supply a frying machine at high level.
After correcting the reverse polarity on the two sockets i plugged the fryer back in and the circuit tripped out and the appliance popped.

I cant seem to work out why the original appliances required the sockets to have incorrect polarity at the socket, and after correcting the reverse polarity the appliance tripped the fuse.

I checked the newly configured polarity and the sockets were correctly wired wheres before the L-N had been reversed.

What tripped CB,RCBO or RCD what instrument did you use to confirm correct polarity? looks like you need to carry out some more test on the circuit supplying the 2 twin sockets

 

[chris day]

What tripped CB,RCBO or RCD

Ow yes the MCB tripped

 

[Pete999]

Ow yes the MCB tripped

Was the fryer switched on? at the fryer?

 

[Barnaby Stedman]

have you checked out the way that the cable for the fryer was wired into the frier?

 

[chris day]

Was the fryer switched on?

as soon as i switched the socket on with the fryer switched off it tripped.

 

[chris day]

have you checked out the way that the cable for the fryer was wired into the frier?

I cannot open the fryer up as its fixed into a unit

 

[Pete999]

as soon as i switched the socket on with the fryer switched off it tripped.

Did the CB stay on without the fryer plugged in? and have you checked inside the plug top?

 

[chris day]

Did the CB stay on without the fryer plugged in? and have you checked inside the plug top?

Without the fryer plugged in the MCB stays on, i checked the plug top and it was fine.

 

[Pete999]

Without the fryer plugged in the MCB stays on, i checked the plug top and it was fine.

Fault on the fryer then, diagnosing from afar. As the job was an EICR thats, an inspection of the fixed wiring, which you have found and rectified a fault, your client needs to get the fryer tested under ISITEE the new way of saying PATesting, in my opinion.

 

[buzzlightyear]

Carried out an eicr and noticed x2 double sockets have reverse polarity that supply a frying machine at high level.

if you are doing a EICR ,why are you correcting it ,c1 on the test sheet.

 

[Pete999]

if you are doing a EICR ,why are you correcting it ,c1 on the test sheet.

Probably agreed with the client to rectify any small easy to fix faults, that's an assumption on my part. But a very good point.

 

[chris day]

if you are doing a EICR ,why are you correcting it ,c1 on the test sheet.

Sorry this was a return visit to correct the faults found

 

[static zap]

Sounds like you are the victim of a
Bodger who reversed polarity in 1st place !
--Appliance was faulty -But should have been tested before it was plugged in ?--

 

[buzzlightyear]

disconnect the fryers and tell the customer what you found and if so pull the fuse out of the fryers

 

[westward10]

Sounds like a live to earth fault between the plug and the fryer on/off switch. Incorrect polarity at the socket has changed this to a neutral/earth fault and is a possible reason it did not trip the protective device, maybe

 

[Barnaby Stedman]

simple answer - get the frier out if poss and you will probably find that the incoming cable is wired in reverse polarity

 

[Lucien Nunes]

As per Westy, if the circuit is not RCD protected, there is likely an L/E fault in the fryer that was hidden, maybe deliberately, by the reverse polarity at the socket. An IR test or visual will probably find it in minutes, could be within an element. If an RCD is present, it is mildly surprising that this did not trip but doesn't change anything.

 

[Silly Sausage]

Sounds like you are the victim of a
Bodger who reversed polarity in 1st place !
--Appliance was faulty -But should have been tested before it was plugged in ?--

Along with Westy & Lucien, you could well be right.
But why not just just swap L/N in the plugs?

 

[Pete999]

Along with Westy & Lucien, you could well be right.
But why not just just swap L/N in the plugs?

That's not fixing the fault Archy, that's bodging to get it to work improperly.

 

[Intoelectrics]

Along with Westy & Lucien, you could well be right.
But why not just just swap L/N in the plugs?

That was my initial thought also. Could be just a coincidence and the fryer/s developed the fault over a period of time which was just not picked up due to the reversed polarity.

 

[Intoelectrics]

That's not fixing the fault Archy, that's bodging to get it to work improperly.

I don't think archy was implying to bodge it now I think he meant why hadn't the person installing the fryers bodged it that way instead of going to the trouble of doing it at the socket outlets.

 

[Pete999]

I don't think archy was implying to bodge it now I think he meant why hadn't the person installing the fryers bodged it that way instead of going to the trouble of doing it at the socket outlets.

Ah OK, sorry Archy, never meant to imply you were a bodger, in any stretch of the imagination.

 

[westward10]

To swap in the plug you would have to make it off again, swapping at the socket is less time consuming.

 

[Pete999]

To swap in the plug you would have to make it off again, swapping at the socket is less time consuming.

And the best and correct option.

 

[ruston]

Do you know if the Fryer was working in the first place? They are notorious for cooking their own innards. Usually the heat resistant cable doesn't.

 

[Pete999]

Sorry this was a return visit to correct the faults found

Need all relevant info Chris for accuracy with responses.

 

[gazdkw82]

How did you confirm incorrect polarity? Was it visually or measured?

 

[sparksburnout]

What the hell is happening about the chips while all this arsing about is going on???

 

[Dave OCD]

I'm afraid they've had their chips at that establishment.

 

[ruston]

There will be plenty crispy bits inside the fryer to make up for the chips.